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Blind-adaptive combined suppression method for satellite navigation cheating jamming and suppressing jamming

A suppressive interference and blind self-adaptive technology, applied in the field of satellite navigation anti-interference, can solve problems such as the inability to guarantee the safe application of GNSS, achieve suppression of two types of interference, and achieve simple effects

Active Publication Date: 2016-06-01
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Application Information

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Problems solved by technology

However, the methods described above only consider an environment where interference exists, so the safe application of GNSS cannot be guaranteed. Therefore, it is necessary to propose a joint suppression of deceptive interference and suppressive interference.

Method used

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  • Blind-adaptive combined suppression method for satellite navigation cheating jamming and suppressing jamming
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  • Blind-adaptive combined suppression method for satellite navigation cheating jamming and suppressing jamming

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Embodiment Construction

[0020] specific implementation plan

[0021] The blind adaptive joint suppression method of satellite navigation spoofing and suppressing interference provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. For the sake of convenience, the GPS system and the equidistant array antenna composed of M array elements are taken as examples below. In fact, the present invention is applicable to any array antenna and does not need to know the array manifold information.

[0022] Such as Figure 7 As shown, the joint suppression method of satellite navigation deception type provided by the present invention and suppression type interference blind adaptation comprises the following steps:

[0023] 1) down-converting the radio frequency signal received by the array antenna into multiple digital intermediate frequency signals;

[0024] The forwarding spoofing jamming signal is to use a spoofing jammer t...

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Abstract

The invention discloses a blind-adaptive combined suppression method for satellite navigation cheating jamming and suppressing jamming. The method comprises: down conversion is carried out on a radio frequency signal received by an array and the processed signal is converted into a digital intermediate-frequency signal; an opposite angle loading value is selected and negative opposite angle loading is carried out on a covariance matrix of the signal received by the array after A / D conversion to obtain a new covariance matrix; and then with a minimum power algorithm, a beam pattern with nulls formed adaptively in incoming wave directions of suppressing jamming and cheating jamming is obtained. According to the invention, a null can be formed in an incoming wave direction of the jamming adaptively under the circumstances that the numbers of the suppressing jamming and cheating jamming as well as incoming wave directions of the suppressing jamming and cheating jamming are not obtained; and an objective of simultaneous suppression of two kinds of jamming can be achieved. The method can be realized simply and an independent anti-interference module can be formed and be embedded into a received.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation anti-jamming, in particular to a blind self-adaptive joint suppressing method of satellite navigation deception and suppression interference. Background technique [0002] The global satellite navigation system (GNSS) can provide all-weather, high-precision navigation and positioning information for various users around the world, but because the satellite signal is extremely weak, it is vulnerable to various types of interference. Suppressive interference is a kind of high-power interference. The existence of this interference can easily make the GNSS receiver unable to work because it cannot lock the satellite signal. Unlike suppressive jamming, transponder spoofing jamming, on the one hand, has a power below the noise level but still above the real satellite signal, and on the other hand, has the same structure as the real satellite signal, so that the GNSS receiver locks on to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 段召亮包莉娜吴仁彪王文益卢丹赵彦雷徐少波张明程李新亮
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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